Symmetry and non-lie reduction of the nonlinear Schrödinger equation von Fushchich, V. I., Chopik, V. I., Фущич, В. І., Чопик, В. І.

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Conditional symmetry and new representations of the Galilean algebra for nonlinear parabolic equations von Fushchich, V. I., Chopik, V. I., Фущич, В. І., Чопик, В. І.

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